Building Start is a field services platform used in construction and engineering to perform centralized test plan authoring and management and push the test plan from the cloud to field devices to perform on-site field testing digitally.

Once a field technician has been assigned a project, they can receive the project on their field device and perform the test plan and responses offline and synchronize them back into the cloud when they complete their work for the day.

Building Start is widely used in the construction industry with over 30,000 construction projects digitally captured in such efforts as Test, Adjust & Balance (TAB), Building Startup, Building Commissioning (LEED, Green Building,etc) and Energy Audits.

What’s New

Version 3.9.3

- Added the ability for file cloud files to be opened in 3rd party apps
- Added the ability on the data summary screen to fill in data on every equipment object with one click
- Added square root to the calculator
- Fixed an issue where the sync summary message would not appear
- Fixed an issue where the parameter library list was not in order
- Fixed an issue with static pressure profile images
- Fixed an issue with using the iOS split screen feature
- Fixed an issue with the Missing Data feature
- Fixed an issue with editing files in the file cloud
- Several other minor bug fixes

Ratings and Reviews

amxp55 ,

Waste of time

The current version is unusable; it crashes literally every few seconds. You can enter one piece of data, but as soon as you select another field to enter further data, the App crashes! Very, very frustrating... especially since an update was promised eight weeks ago.

DR-Finnbalancing ,

Building Start

This app is a great addition to the AirNab data entry for Test and Balance. Once again the developers at Building Start have continued to bring us the technology we need for our daily business needs to improve our productivity.

Dave Reichel

Sharpbw1 ,

Best TAB software for the iPad

Really the only good choice we have on the apple platform. They seem to keep improving it but it still is not as nice as the Windows Tablet version but still totally useable.


Airnab, LLC
21.2 MB

Requires iOS 9.0 or later. Compatible with iPhone 5S, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, iPad Pro (12.9-inch), iPad Pro (12.9-inch) Wi-Fi + Cellular, iPad Pro (9.7‑inch), iPad Pro (9.7-inch) Wi‑Fi + Cellular, iPad (5th generation), iPad (5th generation) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (2nd generation), iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (10.5‑inch), iPad Pro (10.5-inch) Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro (12.9-inch) (3rd generation), iPad Pro (12.9-inch) (3rd generation) Wi-Fi + Cellular, iPad mini (5th generation), iPad mini (5th generation) Wi-Fi + Cellular, iPad Air (3rd generation), iPad Air (3rd generation) Wi-Fi + Cellular, iPad (7th generation), iPad (7th generation) Wi-Fi + Cellular, iPod touch (6th generation), and iPod touch (7th generation).



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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